Compare iS Scales
One of the greatest benefits of the iS Scale system is the ability to directly compare the three different scales.
This means that the score allocated by a professional reviewer using the iS10 Scale can be compared to the score allocated by a user of either the iS6 Scale or the iS5 Scale.
Everyone uses a common “language” for scoring with clearly defined descriptions ensuring there will be no confusion. Of course there is always room for different views but these differences are clearly categorised.
The three iS Scales can be compared as follows:
| iS10 | iS6 | iS5 | Quality Description | Position in category (iS10 scale only) |
| iS 10.0 | ●●●●●● |  |
Magnificent | |
| iS 9.5 | ●●●●●● | |
Exceptional | Top end of Exceptional |
| iS 9.0 | ●●●●●● | |
Exceptional | Mid range of Exceptional |
| iS 8.5 | ●●●●●● | |
Exceptional | Lower end of Exceptional |
| iS 8.0 | ●●●●●○ |  |
Great | Top end of Great |
| iS 7.5 | ●●●●●○ | |
Great | Mid range of Great |
| iS 7.0 | ●●●●●○ | |
Great | Lower end of Great |
| iS 6.5 | ●●●●○○ | |
Good | Top end of Good |
| iS 6.0 | ●●●●○○ | |
Good | Mid range of Good |
| iS 5.5 | ●●●●○○ | |
Good | Lower end of Good |
| iS 5.0 | ●●●○○○ | Ordinary | Top end of Ordinary | |
| iS 4.5 | ●●●○○○ |  |
Ordinary | Mid range of Ordinary |
| iS 4.0 | ●●●○○○ | Ordinary | Lower end of Ordinary | |
| iS 3.5 | ●●○○○○ | |
Disappointing | Top end of Disappointing |
| iS 3.0 | ●●○○○○ | |
Disappointing | Mid range of Disappointing |
| iS 2.5 | ●●○○○○ | |
Disappointing | Lower end of Disappointing |
| iS 2.0 | ●○○○○○ | |
Unacceptable | Top end of Unacceptable |
| iS 1.5 | ●○○○○○ | |
Unacceptable | Mid range of Unacceptable |
| iS 1.0 | ●○○○○○ | |
Unacceptable | Lower end of Unacceptable |
| iS 0.5 | ●○○○○○ | |
Terrible | |
| iS 0.0 | NR | NR | Not Rated |